Upper Thread Puller - Duerkopp Adler 558 Service Instructions Manual

32. Upper Thread Puller

46
1
2
3
4
5
6
7
8
9
10
The upper thread puller 7 makes available an always uniformly long
beginning thread for the secure stitch formation at the seam beginning.
So that the pulled-forward upper thread is not pulled back out of the
upper thread tension, the thread gripper 1 only releases it shortly
before sewing begin.
The function sequence first thread gripping and then upper thread
pulling is therefore important.
Caution Risk of Injury !
Pull the mains plug before setting.
–
Turn the machine into the end position.
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At the length setting slide set the shortest buttonhole length.
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Loosen screw 4.
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Set the bent lever 9 sideways so that there is a safety clearance
between it and the machine arm.
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Tighten screw 4 again.
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Thread the upper thread and turn the machine into the sewing
position.
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Set stop screw 6.
The upper thread puller 5 should lie exactly in the direction of
thread drawing between thread lever 7 and tensioning discs 3.
–
Turn the hand crank until the upper thread puller 7 moves down.
–
Tighten pressure screw 10 so far that the upper thread is just still
securely held.
A too high pressure impedes the operation of the release button 2.
–
Turn the machine into the end position with the hand crank.
The pressure screw moves down on the operating plate 5.
The thread gripper 1 may not be pressed onto the block. Springy
play must be felt. This is the case when by pressing the button 2
the thread gripper still opens.
Continued on the next page !